Machine for making dowel-pins



l L e d 0 M 0 N 1 No. 271,053. Patented Jan.23,1883.

INVE/VT'OI? 490 a z d m WITNESSES Attorney -am M I UNITED STATES PATENTv ()rrice.

I DOUGLAS S. FORGE, OF KINGSVILLE, ASSIGNOR TO HENRY A. EASTMAN,

OF ASHTABULA, OHIO.

MACHINE FOR MAKING DOWEL-PIN S.

SPECIFICATION forming part of Letters Patent No. 271,053, dated January23,1883,

Application filed August 26, 1882. (No model.) i

T all whom it may concern Be it known that I, DOUGLAS S. Fonon, ofKingsville, in the county of Ashtabula and .State of Ohio, have inventedcertain new and useful Improvements in Machines for Making Dowel-Pins;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use the same.

My invention relates to an improvement in machines for makingdowel-pins, the object being to provide an automatically-operatingdevice of this character which shall combine x 5 simplicity andcheapness of construction with ease of operation and durability andefficiency in use.

With these objects in view my invention consists in certain details ofconstruction and combinations of parts, as will be hereinafterdescribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in perspective of amachine embodying myinvention; and Fig.2 is. a view in front 2 5elevation thereof, the former being removed.

The different parts of the device are mounted upon a table, A, which maybe of any convenient form and of any desired construction.

The knife B and the plunger 0, which are 0 adapted to be reciprocatedindependently of each other, are supported in position between aframe-piece, D, secured to the machine-table, and two angle-irons, E,the ends of the same being respectively attached to the top of the 3 5said frame-piece and to the table.

The upper edge of the inner face of the knife is provided with a guard,F, which may be formed integral with or attached to the knife, and whichextends out even with the cutting- 0 edge thereof. The said cutting-edgeof the knife is provided with an inwardly-inclining bevel, Gr, while theouter end of the guard is provided with a similar bevel, H, the objectin beveling the knife and guard in the manner 5 described being toprevent them from interfering with the former I, the construction ofwhich will depend upon the character of the pins to be produced. Theguard F fulfills a twofold function, in that it not only guides theplunger, which is located beneath it, but also, in conjunction with theknife and frame,

prevents the pin-blanks from being displaced as they are forced into theformer by the plunger. The block from which the pin blanks or sectionsare cut is automatically fed forblocks from which the pins are formed.

The knife and plunger are independently re ciprocated by means of adouble-crank device actuated by a shaft, 0, the same being jour- 7onaled in a box, 1?, mounted upon the table A, and actuated by a pulley,Q. The said doublecrank device consists of a crank, R, keyed directly tothe shaft and connected to the rear end of the plunger by a pitman, Sand of a crank, T, rigidly secured to the crank It by the crank-pin U ofthe pitman S,and connected with the rear end of the knife by a pitman,V. 1 In virtue of this construction the knife will receive the mostrapid impulse in being moved 8o forward and back when the plunger isbeing moved the most slowly, while on the other hand, when the plungeris receiving its most rapid impulse in being forced forward andretracted, the knife is receiving the least motion. 8

Having set forth the detailed construction of my improved machine, Iwill now proceed to describe the co-operation of its several parts inperforming their work.

Supposing the knife and plunger to be in 0 their retracted positions,the spring will move the table K and engage the blank block upon it withthe frame-piece D. The knife and its guard will now advance and out offa dowelblank from the said block, remaining in their 5 forward positionof close proximity to the former untilthe plunger has advanced to forcethe blank into the same. Just before the plunger completes its forwardstroke the knife and its guard are withdrawn, the retraction of theplunger following soon after. When both the knife and plunger are intheir retracted positions the-block-holding table will be again 2. In amachine for making dowel-pins, the

actuated to present another section of the block to the action of theknife. This effected, the actuation of the knife and plunger will berepeated in the order above described. It will thus be seen that theaction of the machineis entirely automatic,requiring no attention, saveto replace the blocks as fast as they are exhausted.

I would have it understood that I do not limit myself to the exactconstruction and combination of parts as herein shown and described, butthat I hold myself at liberty to make such slight changes andalterations as fairly fall within the spirit and scope'of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a machine for making dowel-pins, the combination, with a knife, aplunger, and a former, of a table to support the block from which thepins are formed, and spring mecl1- anism to automatically actuate saidtable to successively present new sections of the block to the action ofthe knife and plunger, substantially as set forth.

combination, with a knife, a plunger, and a former, of crank mechanismand pitmen to in-' dependently actuate the knife and plunger in suchmanner that when one is receiving its greatest impulse the other isreceiving its least impulse, substantially as set forth.

3. In a machine for making dowel-pins, the combination, with the tableand frame-piece, of the plunger and knife, the angle-irons E E,

and a double-crank device constructed and attached to the plunger andknife, so that the latter are independently reciprocated, substantiallyas set forth.

4. In a machine for making dowel-pins, the combination, with a plungerand a former, of a knife, a guard, and a frame-piece, the latter beingarranged to inclose the plunger and the dowel-pin blank which theplunger forces into the former, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

DOUGLAS S. FORCE. Witnesses: I

H. A. EASTMAN, T. E. HoY'r.

